CN202929144U - Anti-stealing detector for cable TV system - Google Patents
Anti-stealing detector for cable TV system Download PDFInfo
- Publication number
- CN202929144U CN202929144U CN 201220300909 CN201220300909U CN202929144U CN 202929144 U CN202929144 U CN 202929144U CN 201220300909 CN201220300909 CN 201220300909 CN 201220300909 U CN201220300909 U CN 201220300909U CN 202929144 U CN202929144 U CN 202929144U
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- China
- Prior art keywords
- potential
- output
- user side
- partial pressure
- cable television
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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- 238000007689 inspection Methods 0.000 claims abstract description 31
- 230000007246 mechanism Effects 0.000 claims description 24
- 230000008054 signal transmission Effects 0.000 abstract 3
- 238000010586 diagram Methods 0.000 description 12
- 230000002159 abnormal effect Effects 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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Abstract
The utility model provides a cable television system steals and connects inspection device, wherein include and steal to connect and examine the inspection unit, and steal to connect to be provided with load device between examining inspection unit and the user side TV, steal to connect to examine inspection unit by load device, with itself divide the voltage control in proper voltage range, if load device removes, steal to connect when examining inspection unit lug connection in user side TV or the situation of stealing and connecing takes place, steal to connect to examine the voltage that the inspection unit divides can leave in predetermineeing the voltage range, stop video signal transmission to the user side TV this moment promptly, if need resume video signal transmission, except needing to connect back load device, still must reset cable television system's system control end just can resume video signal's transmission, so cable television system owner can effectively learn whether have the situation of stealing and connecing, thereby carry out appropriate processing.
Description
Technical field
Whether the utility model relates to a kind of robber and connects checking device, and is especially a kind of about connecing inspection unit by the robber, uses detecting in cable television system, have the situation that illegal robber connects occurs, and then make corresponding disposal.
Background technology
Cable television system is provided with program signal receiving equipment and playing device at system's control end of cable television system, then be pulled in the user family with a transmission line (normal operation concentric cable), be connected with user's TV, so the user then can watch the cable channel program by cable television system and coaxial wire, and transmit access channel signal because be with coaxial wire, so it is considerably wide to can be used to transmit the frequency range of signal, therefore can transmit many channels (128 channels are arranged approximately) with current cable with concentric cable, so, the channel that has more decades of times than television station just can be seen in the rating family, and the cable television system dealer can utilize coaxial wire respectively backguy to each user family, provide user's cable channel program, and collect license fee and service fee with this to the user, and form a kind of cable television network system.
Yet whether the shortcoming of existing cable television system is to detect the cable of cable TV of user side and is cut off or steals and connect, the general user is under the normal situation of rating, can not pull out the CATV (cable television) cable that is connected in the user side TV, the situation that the CATV (cable television) cable can be pulled out has many kinds, the situation that wherein makes most the wired system dealer perplex most is exactly, the disabled user pulls out the CATV (cable television) cable, steal the behavior that connects to make things convenient for it to be engaged in, because whether the cable of cable TV that system's control end can't detect user side is cut off or steals and connect, therefore system's control end still can continue to transmit signal, so the user can not know god, finishing illegal robber under the situation that ghost be can not help connects, need only after the robber connects and finishes the CATV (cable television) cable is connected with the user side TV again, just can watch CATV (cable television), this measure has a strong impact on according to the facts paying customer's rights and interests, also be unfavorable for cable television operators' operation, therefore must provide a kind of cable of cable TV that can detect whether to be cut off or to steal the robber who connects and connect checking system, judge whether to continue to transmit the cable television channels signal for cable television system.
The utility model content
Fundamental purpose of the present utility model is to provide a kind of robber of cable television system to connect checking device, wherein cable television system is equiped with to steal and connects inspection unit, whether the robber connects inspection unit and mainly utilizes bleeder mechanism monitoring and detect and disconnect, the robber connects or the situation of other load abnormal, in case above-mentioned one of them situation occurs, then automatically stop immediately transmitting video signal to the user side TV, because video signal is cut off, even if again take back bleeder mechanism and cable, the user side TV still can't the show image picture because of the cut relation of video signal, unique mode just can only will reset control module by the cable television system dealer, therefore the cable television system dealer by the phone liaison method or show up find out can't rating situation, thereby make suitable disposal.
The robber of cable television system provided by the utility model connects checking device, in case detect the unusual phenomenon of dividing potential drop, just stop to transmit video signal to unusual user side, unless get rid of unusual condition and reset control end by the cable television system dealer, otherwise can't recover to transmit, therefore can improve can't effectively detecting of prior art and steal the problem that connects and make suitable disposal, to safeguard according to the facts paying customer's and dealer rights and interests.
Description of drawings
Fig. 1 is that the robber of cable television system of the present utility model connects the checking device synoptic diagram;
Fig. 2 is the exemplary circuit diagram that robber of the present utility model connects inspection unit and signal output control unit;
Fig. 3 is that robber of the present utility model connects inspection unit and the user side TV forms the synoptic diagram of opening a way;
Fig. 4 is that robber of the present utility model connects inspection unit directly and user side TV connection diagram;
Fig. 5 is that robber of the present utility model connects the synoptic diagram that inspection unit is connected with non-user side TV; And
Fig. 6 is the embodiment synoptic diagram that the robber of cable television system of the present utility model connects checking device.
The primary clustering symbol description
10 robbers connect inspection unit
30 control modules
50 signal output control units
60 bleeder mechanisms
101 input ends
103 output terminals
105 first comparing units
107 second comparing units
109 load components
601 detect assembly
603 splitters
The Vcc1 input voltage
The Vd partial pressure potential
Vb1 the first reference potential
Vb2 the second reference potential
LTV user side TV
The non-user side TV of NLTV
The S video signal
Embodiment
Those skilled in the art below cooperate graphic and element numbers is done more detailed description to embodiment of the present utility model, so that can implement after studying this instructions carefully according to this.
Referring to Fig. 1, Fig. 1 is that the robber of cable television system of the present utility model connects the checking device synoptic diagram.As shown in Figure 1, the robber of cable television system of the present utility model connects checking device and comprises at least stealing and connect inspection unit 10, control module 30 and signal output control unit 50.Be noted that only to demonstrate the unit relevant with the utility model feature in graphic, do not demonstrate other well-known unit, with convenient explanation the utility model content, that is, although this cable television system also comprises other unit, do not affect the following description.
Referring to Fig. 2, Fig. 2 is the exemplary circuit diagram that robber of the present utility model connects inspection unit and signal output control unit.Being noted that Fig. 2 is the exemplary embodiment that the utility model feature is described, is not to limit scope of the present utility model, and therefore, the utility model comprises mutually other circuit design of equity.
Also please cooperate Fig. 1 referring to Fig. 2, robber of the present utility model connects between inspection unit 10 and the user side TV LTV and is connected with bleeder mechanism 60, the robber connects inspection unit 10 and has input end 101, output terminal 103, the first comparing unit 105, the second comparing unit 107 and load component 109, input end 101 is connected with input voltage Vcc1, be connected with bleeder mechanism 60 between this output terminal 103 and the user side TV LTV, the first comparing unit 105 has two first input ends and the first output terminal D1, one of them first input end has the first reference potential Vb1, the second comparing unit 107 has two second input ends and the second output terminal D2, and one of them second input end has the second reference potential Vb2.Wherein this first comparing unit 105 and this second comparing unit 107 are an operational amplifier.
The current potential that another second input end links to each other with another first input end is partial pressure potential Vd, wherein can produce the first output potential in the first output terminal D1 behind partial pressure potential Vd and the first reference potential Vb1, can produce the second output potential in the second output terminal D2 behind partial pressure potential Vd and the second reference potential Vb2, between partial pressure potential Vd and the input end 101 and between partial pressure potential Vd and the output terminal 103 one of them is connected with load component 109 at least at least, perhaps can be with reference to shown in Fig. 2 embodiment, between partial pressure potential Vd and input end 101 and partial pressure potential Vd and output terminal 103 amongs be provided with load component 109.Wherein this load component 109 is a resistance.
Wherein input voltage Vcc1 is higher than the second reference potential Vb2 at least, and the second reference potential Vb2 is higher than the first reference potential Vb1 at least, wherein partial pressure potential Vd decides according to bleeder mechanism 60, wherein when partial pressure potential Vd is higher or lower than the first reference potential Vb1, the first output potential is a noble potential or an electronegative potential, when wherein being higher or lower than the second reference potential Vb2 when partial pressure potential Vd, the second output potential is a noble potential or an electronegative potential.Wherein bleeder mechanism 60 can be splitter, detect assembly and other appropriate device.
Wherein when this first output potential is different from this second output potential, this moment, the video signal S of this message output control unit 50 was sent to user side TV LTV, if the first output potential is same as the second output potential, 50 of message output control units stop to transmit video signal S to user side TV LTV.
For further specifying mode of operation of the present utility model, set input voltage Vcc1 for 5V at this, and the first reference potential Vb1 and the second reference potential Vb2 are set as respectively the voltage of 1V and 4V, and partial pressure potential Vd then is controlled between 1V and the 4V, at this partial pressure potential Vd is located at 2.5V.
By the law of partial pressure as can be known, via the load of suitable distribution load component 109 with bleeder mechanism 60, partial pressure potential Vd is controlled between 1V and the 4V such as 2.5V, because the partial pressure potential Vd of 2.5V can be greater than the first reference potential Vb1 of 1V but less than the second reference potential Vb2 of 4V, the first output potential like this and the second output potential can be respectively noble potential and electronegative potential, as indicated above, when the first output potential and the second output potential difference, this moment, the video signal S of this message output control unit 50 was sent to this user side TV LTV, viewed and admired so that the user to be provided.
Referring to Fig. 3, Fig. 3 is that robber of the present utility model connects inspection unit and the user side TV forms the synoptic diagram of opening a way.When bleeder mechanism 60 is removed, the robber connects between inspection unit 10 and the user side TV LTV and forms open-circuit condition, by the law of partial pressure as can be known, partial pressure potential Vd can get the voltage of about 5V, because partial pressure potential Vd can be greater than the first reference potential Vb1 and the second reference potential Vb2, the first output potential that control module 10 receives and the second output potential can be noble potential simultaneously, as indicated above, when the first output potential and the second output potential are identical, stop immediately transmitting video signal S to user side TV LTV this moment.
As mentioned above, characteristics of the present utility model are, when being removed such as splitter 603 and the bleeder mechanism 60 that detects assembly 601, or when stealing the circuit connect between inspection unit 10 and the user side TV LTV and being cut off, the robber connects inspection unit 10 can return this unusual load condition immediately by aforesaid way, and then stops immediately transmitting video signal S to user side TV LTV.
Referring to Fig. 4, Fig. 4 is that robber of the present utility model connects inspection unit directly and user side TV connection diagram.Between meeting inspection unit 10 and user side TV LTV, the robber do not connect bleeder mechanism 60 and when directly being connected, partial pressure potential Vd can only assign to the voltage that is lower than 1V from the input voltage Vcc1 of 5V, therefore partial pressure potential Vd is all less than the first reference potential Vb1 and the second reference potential Vb2, so the first output message D1 and the second output message Vb2 that control module 30 receives are all electronegative potential, as indicated above, when the first output potential and the second output potential are identical, namely stop to transmit video signal S to user side TV LTV.
According to as can be known mentioned above, another characteristics of the present utility model are, the robber connects inspection unit 10 must be by being connected suitable bleeder mechanism 60 with user side TV LTV, mat is controlled between the first reference potential Vb1 and the second reference potential Vb2 partial pressure potential Vd, uses the basis for estimation that whether transmits video signal S for control module 30 conducts.
Referring to Fig. 5, Fig. 5 is that robber of the present utility model connects the synoptic diagram that inspection unit is connected with non-user side TV.When stealing the circuit that connects between inspection unit 10 and the bleeder mechanism 60 situation that connects occurs to steal wherein, this moment, partial pressure potential Vd can divide to such an extent that be lower than the voltage of 1V from input voltage Vcc1, because partial pressure potential Vd is all less than the first reference potential Vb1 and the second reference potential Vb2, so the first output potential and the second output potential that control module 30 receives are all identical electronegative potential, when the first output potential and the second output potential are identical, stop immediately transmitting video signal S to user side TV LTV this moment.
Referring to Fig. 6, Fig. 6 is the embodiment synoptic diagram that the robber of cable television system of the present utility model connects checking device, and cooperation Fig. 1 and Fig. 2, wherein steal and connect inspection unit 10 and can be connected one or more bleeder mechanisms 60 with user side TV LTV, the mode that connects a plurality of bleeder mechanisms 60 can be with reference to figure 3, bleeder mechanism 60 can use splitter 603 and detector 601, the output terminal 103 that the robber connects inspection unit 10 is connected to an end of splitter 603, is connected with between splitter 603 other ends and the user side TV LTV and detects assembly 601.
In sum as can be known, robber of the present utility model connects checking system by bleeder mechanism 60, but effective monitoring and to detect be to disconnect, the robber connects or the situation of other load abnormal, in case above-mentioned one of interim situation occurs, then automatically stop immediately transmitting video signal S to user side TV LTV, even therefore again take back bleeder mechanism 60 and cable, user side TV LTV can't watch because video signal S is cut off, unique mode is notified the cable television system dealer exactly, please the dealer reset control module, the dealer why can initiatively find out can't rating reason, suppose to take back again after the user just removes bleeder mechanism 60 or circuit, as long as to resetting control module and taking back the bleeder mechanism 60 of original installing, can recover to transmit video signal S to user side TV LTV.
If after resetting control module 60, or can't the viewer hold TV LTV, whether the cable television system dealer can the scene of dispatching officers understands to steal and connect, connects situation improper or that other is unusual this moment, and the dealer can suitably be disposed according to on-the-spot actual state.
As long as connect between inspection unit 10 and the user side TV LTV as long as when forming open circuit, open circuit and stealing situation about connecing when stealing, video signal S can be cut off immediately, video signal S one is cut off, even replying normal connection status, circuit still can't watch CATV (cable television), unique mode of recovering video signal S can only reset control module 30, reseting of control module 30 essential relies on the wired system dealer, thus the wired system dealer can find out can't rating reason, to make suitable disposal.
The above person only is in order to explain preferred embodiment of the present utility model; be not that attempt is done any pro forma restriction to the utility model according to this; therefore; all have in that identical creation spirit is lower do relevant any modification of the present utility model or change, all must be included in the category of the utility model intention protection.
Claims (4)
1. the robber of a cable television system connects checking device, it is characterized in that, includes at least:
One robber connects inspection unit, has an input end, one output terminal, one first comparing unit, one second comparing unit and a load component, this input end connects an input voltage, be connected with a bleeder mechanism between this output terminal and the user side TV, this first comparing unit has two first input ends and one first output terminal, one first input end has one first reference potential, this second comparing unit has two second input ends and one second output terminal, one second input end has one second reference potential, the current potential that another second input end is connected with another first input end is defined as a partial pressure potential, wherein can produce one first output potential in this first output terminal behind this partial pressure potential and this first reference potential, can produce one second output potential in this second output terminal behind this partial pressure potential and this second reference potential, between this partial pressure potential and this input end and between this partial pressure potential and this output terminal one of them is connected with this load component at least at least, wherein this input voltage is at least greater than this second reference potential, this second reference potential is at least greater than this first reference potential, when this partial pressure potential when being higher or lower than this first reference potential, this first output potential can produce a noble potential or an electronegative potential, when this partial pressure potential when being higher or lower than this second reference potential, this second output potential can be a noble potential or an electronegative potential;
One control module receives this first output potential and this second output potential, and judges whether this first output potential and this second output potential be identical; And
Whether one message output control unit receives a video signal, and identical according to the current potential of this first output potential and this second output potential, whether is sent to this user side TV to determine this video signal;
Wherein, when being connected with this bleeder mechanism between this output terminal and this user side TV, when the magnitude of voltage that this partial pressure potential is assigned to must be between this first reference potential and this second reference potential, this moment, this first output potential was different from this second output potential, and this moment, this video signal of this message output control unit was sent to this user side TV;
When not being connected with this bleeder mechanism between this output terminal and this user side TV or occur stealing when connecing, the magnitude of voltage that this partial pressure potential is assigned to then can be between this first reference potential and this second reference potential, this moment, this first output potential was same as this second output potential, and this message output control unit then stops to transmit this video signal to this user side TV.
2. the robber of cable television system as claimed in claim 1 connects checking device, it is characterized in that, this bleeder mechanism is one to detect assembly and a splitter.
3. the robber of cable television system as claimed in claim 1 connects checking device, it is characterized in that, this first comparing unit and this second comparing unit are an operational amplifier.
4. the robber of cable television system as claimed in claim 1 connects checking device, it is characterized in that, this load component is a resistance.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| TW101204814U TWM435789U (en) | 2012-03-16 | 2012-03-16 | Cable systems for burglary connection detecting device |
| TW101204814 | 2012-03-16 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202929144U true CN202929144U (en) | 2013-05-08 |
Family
ID=47048276
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220300909 Expired - Lifetime CN202929144U (en) | 2012-03-16 | 2012-06-26 | Anti-stealing detector for cable TV system |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN202929144U (en) |
| TW (1) | TWM435789U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103293428A (en) * | 2012-03-05 | 2013-09-11 | 张镇非 | Anti-stealing detector for cable TV system |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TW201415734A (en) * | 2012-10-04 | 2014-04-16 | Zhen-Fei Zhang | Indoor splitter of cable TV system |
-
2012
- 2012-03-16 TW TW101204814U patent/TWM435789U/en not_active IP Right Cessation
- 2012-06-26 CN CN 201220300909 patent/CN202929144U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103293428A (en) * | 2012-03-05 | 2013-09-11 | 张镇非 | Anti-stealing detector for cable TV system |
| CN103293428B (en) * | 2012-03-05 | 2015-07-22 | 张镇非 | Anti-stealing detector for cable TV system |
Also Published As
| Publication number | Publication date |
|---|---|
| TWM435789U (en) | 2012-08-11 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20130508 Effective date of abandoning: 20150722 |
|
| AV01 | Patent right actively abandoned |
Granted publication date: 20130508 Effective date of abandoning: 20150722 |
|
| RGAV | Abandon patent right to avoid regrant |